Spin-1/2 kagome-like lattice in Volborthite Cu3V2O7(OH)2•2H2O

被引：229

作者：

Hiroi, Z ^{[1
]}

Hanawa, M

Kobayashi, N

Nohara, M

Takagi, H

Kato, Y

Takigawa, M

机构：

[1] Univ Tokyo, Inst Solid State Phys, Kashiwa, Chiba 2778581, Japan

[2] Toda Kogyo Corp, Hiroshima 7390652, Japan

[3] Univ Tokyo, Grad Sch Frontier Sci, Bukyo Ku, Tokyo 1138656, Japan

来源：

JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN | 2001年 / 70卷 / 11期

关键词：

kagome lattice; cuprate; magnetic susceptibility; specific heat; NMR;

D O I：

10.1143/JPSJ.70.3377

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

A novel cuprate Volborthite, Cu3V2O7(OH)(2). 2H(2)O, containing an S-1/2 (Cu2+ spin) kagome-like lattice is studied by magnetic susceptibility, specific heat, and V-51 NMR measurements. Signs for neither long-range order nor spin-gapped singlet ground states are detected down to 1.8 X in spite of large antiferromagnetic couplings of similar to 100 K between Cu spins forming a two-dimensional kagome-like network. It is suggested that Volborthite represents a system close to a quantum critical point between classical long-range ordered and quantum disordered phases.

引用

页码：3377 / 3384

页数：8

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